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Cookbook TESTING doc

This document describes the process for testing Chef community cookbooks using ChefDK.

Testing Prerequisites

A working Chef Workstation installation set as your system's default ruby. Chef Workstation can be downloaded at https://downloads.chef.io/chef-workstation/

Hashicorp's Vagrant and Oracle's Virtualbox for integration testing.

Local Delivery

For consistent testing across the 100+ Chef Software managed community cookbooks we use the Delivery CLI tool and the local delivery mode. This allows us to remotely host a single Delivery project.toml file that applies to all of our cookbooks.

Delivery defines testing in phases and cookbooks utilize lint, syntax, and unit phases.

To run an individual phase:

delivery local unit

To run all phases:

delivery local all

lint stage

The lint stage runs Ruby specific code linting using Cookstyle. Cookstyle offers a tailored RuboCop configuration enabling / disabling rules to better meet the needs of cookbook authors. Cookstyle ensures that projects with multiple authors have consistent code styling.

unit stage

The unit stage runs unit testing with ChefSpec. ChefSpec is an extension of Rspec, specially formulated for testing Chef cookbooks. Chefspec compiles your cookbook code and converges the run in memory, without actually executing the changes. The user can write various assertions based on what they expect to have happened during the Chef run. Chefspec is very fast, and quick useful for testing complex logic as you can easily converge a cookbook many times in different ways.

Integration Testing

Integration testing is performed by Test Kitchen. After a successful converge, tests are uploaded and ran out of band of Chef. Tests should be designed to ensure that a recipe has accomplished its goal.

Integration Testing using Vagrant

Integration tests can be performed on a local workstation using either VirtualBox or VMWare as the virtualization hypervisor. To run tests against all available instances run:

chef exec kitchen test

To see a list of available test instances run:

chef exec kitchen list

To test specific instance run:

chef exec kitchen test INSTANCE_NAME

Private Images

Some operating systems have specific licenses that prevent us from making those images available freely. We either comment these the .kitchen.yml or create a separate .kitchen.vmware.yml file for Chef internal use.

Images include:

  • SLES 12 / 12SP1
  • Solaris 10.11

If you are a Chef employee, you will need to get VMWare Fusion, Vagrant plugin for VMWare, and set up a Hashicorp Vagrant Cloud account that has access to the Chef images.

Once you have the required software, login to Vagrant Cloud from the command line. Use the private instances from the kitchen.yml file, or set the environment variable KITCHEN_LOCAL_YAML to kitchen.vmware.yml.

Otherwise if you are not a Chef employee, in order to test these operating systems you will need to obtain the appropriate licenses and images as needed.